Transparent lid for stoves



IN VEN TOR.

Attorney:

R; E. GRAFFAM TRANSPARENT LID FOR STOVES Filed May 28, 1952 Ralph E. Graffam July 16, 1957 United States Patent O 2,799,268 TRANSPARENT LID FOR STOVES Ralph E. Gralfam, Westbrook, Maine Application May 28, 1952, Serial No. 290,543 7 2 Claims. (Cl. 126220) The present invention relates to covers and lids of the customary substantially flat discoidal or circular type and wherein a kitchen range or similar so-called cookstove is provided with a flat top and one or more holes to be covered by lids such as mentioned.

The ordinary stove lid is imperforate, non transparent and circular, as stated, and has a recess in its topfor reception of a handle-equipped lid lifter through the medium of which the lid may be opened and closed with convenience and for purposes of inspecting the interior of the stove. Such lids are used, for the most part, where the fuel in the stove is coal or wood. Of late, however, many oil burning and gas burning stoves have come into the vogue and it is still desirable to have access thereto by way of the lidded holes. In either event, there has been a need for a transparent lid, one which can without necessarily being removed, enable the observe to make periodical inspections to see if the burner is burning properly. More explicitly, one form of a transparent stove lid is covered in a patent granted to one Anthony Grigas under 2,172,469 of September 12, 1939.

In the patent mentioned, a composite construction was found necessary for use, the same characterized by a metallic ring, a glass plate supported by the metallic ring, and a body of asbestos located between the metallic ring and the glass plate to prevent the latter from having direct contact with the metallic ring.

It has been found, as will hereinafter be more specifically revealed, that one can dispense with the asbestos media and as a matter of fact the metallic ring and can use a single and simply flanged transparent fireproof lid by merely venting the lid through the medium of the multiplicity of the holes which are bored or otherwise formed therein.

Another improvement has to do with the underside of the lid which is rendered more effective for heat radiation as well as absorption properties by increasing the radiation area, this being done by way of pocket like recesses formed said underside of the lid.

Other objects, features, and advantages will become more readily apparent in the following description and the accompanying sheet of illustrative drawings.

In the accompanying sheet of drawings wherein like numerals are employed to designate like parts throughout the views:

Figure 1 is a plan view of a transparent stove lid constructed in accordance with the principles of the present invention.

Figure 2 is a cross-section on the central line 2-2 of Figure 1 looking in the direction of the arrows.

Figure 3 is a view in section and elevation, showing a fragmentary portion of a kitchen range or stove with the top having a lid opening and the lid fitted into the opening, said lid being the subject of the instant invention.

Figure 4 is a fragmentary bottom plan view of the improved lid.

In Figure 3 the range or stove is denoted by the numeral 6 and is of conventional construction and of the burner means therein is denoted at 8. There is a lid or cover opening 10 in the flat top and this has a supporting ledge 12, as usual, for a marginally flanged cover or lid 2,799,268 Patented July 16, 1957 ice 14. The lid here is of transparent fireproof and substantially fracture-proof glass 16. Actually, it resembles any ordinary lid or cover in that it is circular andhas a flat top, and also has a body portion 18 which telescopes into the hole and an outstanding marginal supporting flange 20 which rests on the ledge 12, all as shown in Figure 3.

In addition to being of improved fireproof glass the lid is provided in its underside with a multiplicity of cavities or recesses. These pocket-like formations are preferably pyramidal in form and are denoted by the numerals 22. They serve to distribute and more satisfactorily radiate the heat. Registering with the apical or crown portion of each pocket is a passage or hole 24. There are a multiplicity of such holes and they extend from top to bottom through the lid. The usual lid lifter recess is denoted at 26 and provided with an undercut portion 28 for the toe of the lifter.

This stove cover is designed to help the housewife save time and work. The housewife can see and observe the condition of the fire without removing the covers and undesirably letting out smoke or gases into the kitchen.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in shape, size and arrangement of details coming within the field of invention claimed may be resorted to in actual practice, if desired.

Having described the invention, what is claimed as new is:

l. A stove lid constructed of substantially indestructible fireproof and heat resisting transparent glass, the entire bottom surface of said lid having a multiplicity of heat pocketing and concentrating depressions, all of said depressions except those at the margin being substantially pyramidal in shape and proportioned and located to pro vide a wall of V-shaped section between any two proximate depressions, said walls defining two series of grid lines of uniform spacing at the bottom of the lid, the grid lines of one series intersecting the grid lines of the other series at right angles, and a multiplicity of holes, one for each depression and extending vertically through said cover and efiecting communication between the apex of its depression and the upper surface of the lid.

2. A stove lid constructed of substantially indestructible fireproof and heat resisting transparent glass and including a peripheral shoulder spaced from the bottom surface of the lid, the entire bottom surface of said lid having a multiplicity of heat pocketing and concentrating depressions terminating below said shoulder, all of said depressions except those at the margin being substantially pyramidal in shape and proportioned and located to provide a wall of V-shaped section between any two proximate depressions, said walls defining two series of grid lines of uniform spacing at the bottom of the lid, the grid lines of one series intersecting the grid lines of the other series at right angles, and a multiplicity of holes, one for each depression and extending vertically through said cover and effecting communication between the apex of its depression and the upper surface of the lid.

References Cited in the file of this patent UNITED STATES PATENTS 

